/Engine/Plugins/Animation/IKRig/Source/IKRigEditor/Public/RigEditor/SIKRigHierarchy.h
EndSMultiColumnTableRowdrag and drop
[FReply](API\Runtime\SlateCore\Input\FReply) HandleDragDetected ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & MyGeometry, const [FPointerEvent](API\Runtime\SlateCore\Input\FPointerEvent) & MouseEvent )